A diatomaceous earth filter bag tensioning mechanism
By combining the inner ring plate, outer ring plate, and tensioning screw, the problems of poor filtration effect and increased filter weight caused by filter bag sagging due to its own weight are solved. This achieves uniform tension of the filter bag and increases the filtration area, thereby improving filtration efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAOJI ZHONGCHENG PHARMA MACHINERY
- Filing Date
- 2025-09-05
- Publication Date
- 2026-07-31
AI Technical Summary
In existing diatomaceous earth filters, the filter bags rely on their own weight to sag and tighten, resulting in poor filtration performance and increased overall filter weight due to the weight of the tensioning wheel.
The tensioning mechanism, consisting of an inner ring plate and an outer ring plate, achieves uniform tension of the filter bag by contacting the flat sealing edge of the filter bag with the tensioning screw, combined with the adjusting nut and adjusting screw. Furthermore, the combination of the suspension screw and the top plate accommodates manufacturing errors of the filter bag and increases the filtration area.
This achieves uniform tension in each filter bag, reduces the weight of the filter, improves filtration efficiency and area, and solves the problem of poor filtration effect caused by filter bag sagging due to its own weight.
Smart Images
Figure CN224573326U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of diatomaceous earth filtration technology, and in particular to a diatomaceous earth filter bag tensioning mechanism. Background Technology
[0002] Diatomaceous earth is a natural mineral with sound insulation, heat insulation, dehumidification, and deodorization functions. It purifies liquids through a combination of physical retention and chemical adsorption, and is commonly used in water treatment for filtering drinking water, swimming pool water, and in the food and beverage industry. It also has applications in the pharmaceutical and chemical industries, and in battery copper foil production.
[0003] Currently, the structure of diatomaceous earth filters is as follows: Figure 1 As shown, several filter bags are suspended inside, and after installation, they are tensioned by their own weight. Due to the large number of filter bags, the tensioning effect using tensioning wheels at the bottom is not obvious, and the tensioning wheels are heavy and difficult to install. This results in poor filtration of the filter bags and a large overall weight of the filter due to the tensioning wheels. Summary of the Invention
[0004] To address the aforementioned problems, this application aims to provide a diatomaceous earth filter bag tensioning mechanism that can ensure each filter bag is tensioned while reducing the weight of the diatomaceous earth filter, and simultaneously increase the filtration area and improve filtration efficiency.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a diatomaceous earth filter bag tensioning mechanism, wherein the top of the filter bag is a circular opening and the bottom is a flat sealing edge. The filter bag is suspended inside the diatomaceous earth filter through its circular opening and arranged at circumferential intervals. The tensioning mechanism includes an inner ring plate and an outer ring plate. The inner ring plate is coaxially connected to the bottom end of a downwardly extending central connecting rod in the diatomaceous earth filter. The outer ring plate is coaxially connected to the inner ring plate through first ribs arranged at circumferential intervals. A plurality of tensioning screws are arranged at circumferential intervals between the inner ring plate and the outer ring plate. The tensioning screws are connected to the flat sealing edge of each filter bag. The filter bag is tensioned downward by the natural downward movement of the tensioning mechanism.
[0006] Preferably, an adjusting plate is provided at the top of the inner ring plate, and a top plate is provided above the adjusting plate. The top plate is sleeved on the central connecting rod, and a suspension screw is provided at circumferential intervals on the bottom surface of the top plate. The suspension screw passes through the adjusting plate, and an adjusting nut that abuts against the bottom surface of the adjusting plate is sleeved on the suspension screw. By rotating the adjusting nut, the height of the tensioning screw is adapted to the height error of the filter bag manufacturing.
[0007] Preferably, the adjusting plate is provided with adjusting screws at circumferential intervals, and the adjusting screws are spaced apart from the suspension screws, with the top of the adjusting screws abutting against the bottom surface of the top plate. By rotating the adjusting screws, the tensioning screws are moved downward to mechanically tension the filter bag downward.
[0008] Preferably, a plurality of second stiffening plates are provided on the top surface of the top plate, and the sidewalls of the second stiffening plates are connected to the outer wall of the central connecting rod; a plurality of weight-reducing holes are provided on the adjusting plate.
[0009] Preferably, the tensioning screw is threadedly connected to the inner ring plate, and the screw head of the tensioning screw abuts against the outer wall of the outer ring plate.
[0010] The beneficial effects of this application are: the tensioning mechanism disclosed in this application can solve the problem of increased filter weight due to the weight of the tensioning wheel while ensuring that each filter bag is tensioned. At the same time, after the filter bags are tensioned, the filtration area is effectively increased, improving the filter's filtration efficiency. Attached Figure Description
[0011] Figure 1 This is a diagram showing the current suspension of filter bags inside a diatomaceous earth filter.
[0012] Figure 2 for Figure 1 Top view.
[0013] Figure 3 This is a top view of the filter bag.
[0014] Figure 4 This is a bottom view of the filter bag.
[0015] Figure 5 This is a top view of the tensioning mechanism of this application (the first stiffener and tensioning screw are not shown).
[0016] Figure 6 For this application Figure 5 The first stiffening plate diagram is shown on the basis.
[0017] Figure 7 For this application Figure 6 The tensioning screw diagram is shown below.
[0018] Figure 8 This is a front view structural diagram of the tensioning mechanism in this application.
[0019] Figure 9 This is a tensioning diagram of the filter bag for the tensioning mechanism in this application.
[0020] Figure 10 For this application Figure 9 Enlarged view of the structure at point A in the middle.
[0021] In the diagram: 1-Diatomaceous earth filter; 11-Feed pipe; 12-Central connecting rod; 2-Filter bag; 2a-Circular opening; 2b-Metal ring; 21-Flat sealing edge; 22-Tensioning cloth sheet; 31-Inner ring plate; 32-Outer ring plate; 4-First stiffener; 5-Tensioning screw; 6-Adjusting plate; 6a-Weight reduction hole; 7-Top plate; 81-Suspension screw; 82-Adjusting nut; 91-Tensioning nut; 92-Adjusting screw; 10-Second stiffener. Detailed Implementation
[0022] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] See attached document Figures 5-10 The diagram shows a diatomaceous earth filter bag tensioning mechanism, such as... Figure 3-4 As shown, the filter bag 2 has a circular opening 2a at the top and a flat sealing edge 21 at the bottom. The filter bag 2 is suspended inside the diatomaceous earth filter 1 through its circular opening 2a and arranged at circumferential intervals. The top port of the filter bag 2 is usually flanged and sewn with a metal ring 2b, so that the top port of the filter bag 2 is a fixed circular opening 2a, and the metal ring allows the filter bag 2 to be suspended in the diatomaceous earth filter 1. The circumferentially distributed feed pipes 11 in the diatomaceous earth filter 1 extend into the filter bag 2 through the circular opening 2a for feeding. The bottom end of the filter bag 2 is usually sewn with a flat sealing edge 21.
[0024] Currently, the filter bag 2 hangs down naturally in the diatomaceous earth filter 1. To increase the filtration area of the filter bag 2, this application includes a tensioning mechanism, such as... Figure 5-8 As shown, it includes an inner ring plate 31 and an outer ring plate 32. The inner ring plate 31 is coaxially connected to the bottom end of the downward-extending central connecting rod 12 in the diatomaceous earth filter 1. The outer ring plate 32 is coaxially connected to the inner ring plate 31 by first stiffeners 4 arranged at circumferential intervals. Preferably, six first stiffeners 4 are welded and fixed to the inner ring plate 31 and the outer ring plate 32, arranged circumferentially. Figure 6 As shown.
[0025] like Figure 7 As shown, a plurality of tensioning screws 5 are inserted circumferentially between the inner ring plate 31 and the outer ring plate 32, the number of which is the same as the number of filter bags 2. The tensioning screws 5 are connected to the planar sealing edge 21 of each filter bag 2 and can drive the filter bag 2 to be tensioned downwards. Preferably, during the manufacturing process, a perforation can be sewn into the planar sealing edge 21 of each filter bag 2, and the tensioning screws 5 are inserted into the perforation. The tensioning screws 5 then tension the entire filter bag 2 downwards, thereby increasing the effective filtration area of the filter bag 2 and improving the filtration effect. Alternatively, a method such as... Figure 10As shown, a tensioning cloth 22 is sewn onto the bottom surface of the filter bag 2. A perforation is formed between the tensioning cloth 22 and the filter bag 2. The tensioning screw 5 is inserted into the perforation to tension the filter bag 2 downward.
[0026] To overcome manufacturing errors in the stamping process of the filter bag 2's loops and end caps (i.e., the height inconsistency error that exists in the batch manufacturing of filter bags 2), such as Figure 8 As shown, an adjusting plate 6 is provided at the top of the inner ring plate 31, which, together with the inner ring plate 31, forms a cover structure. A top plate 7 is provided above the adjusting plate 6, and the top plate 7 is fitted onto the central connecting rod 12. After the top plate 7 is fitted to a horizontal position, it can be fixed to the central connecting rod 12 by welding. Suspension screws 81 are provided at circumferential intervals on the bottom surface of the top plate 7. The suspension screws 81 pass through the adjusting plate 6, and adjusting nuts 82 are fitted on the suspension screws 81, abutting against the bottom surface of the adjusting plate 6. By rotating the adjusting nuts 82, the height of the tensioning screw 5 is adapted to the height error of the filter bag 2. Specific operation is as follows... Figure 10 As shown, after the tensioning screw 5 is inserted into the perforation at the bottom of the filter bag 2, the adjusting nut 82 at the corresponding position is rotated according to the position of the perforation at the bottom of the filter bag 2. This causes the horizontal plane of the adjusting plate 6 to change, thereby adjusting the height of the tensioning screw 5 to correspond to the perforation at the bottom of the filter bag 2, thus solving the problem of mismatch in the insertion height of the tensioning screw 5 due to the height error of the filter bag 2. Then, the adjusting nut 82 adjusts the tensioning screw 5 to move downward synchronously. Using the overall gravity of the tensioning mechanism, the filter bag 2 is tensioned downward through the tensioning screw 5.
[0027] To further enhance the tension force on filter bag 2, such as Figure 8 As shown, adjusting screws 92 are circumferentially spaced on the bottom surface of the adjusting plate 6, and the adjusting screws 92 are spaced apart from the suspension screws 81. The adjusting screws 92 are connected by tensioning nuts 91 fixedly mounted on the bottom surface of the adjusting plate 6. The top of the adjusting screw 92 abuts against the bottom surface of the top plate 7. By rotating the adjusting screw 92, the tensioning screws 5 mechanically tension the filter bag 2 downwards. After each tensioning screw 5 is inserted into the perforation formed at the bottom of the filter bag 2 by adjusting the nuts 82, the adjusting screws 92 are rotated as a whole so that their tops abut against the bottom surface of the top plate 7, causing the adjusting plate 6 to move downwards relative to the top plate 7, and further driving the tensioning screws 5 to mechanically tension the filter bag 2 downwards, while simultaneously adjusting the adjusting nuts 82 accordingly. Since the filter bag 2 is made of non-metallic material, it is usually ductile. Therefore, even if the tension of each tensioning screw 5 is inconsistent due to manufacturing errors of the filter bag 2, it can be subjected to downward tension force from the tensioning screw 5 due to the ductility of the filter bag 2. The only difference is the magnitude of the tension force. For example, the shorter filter bag 2 is subjected to a slightly larger tension force, and the longer filter bag 2 is subjected to a slightly smaller tension force.
[0028] To ensure the overall strength of the tensioning mechanism, such as Figure 8As shown, a plurality of second stiffening plates 10 are provided on the top surface of the top plate 7, and the sidewalls of the second stiffening plates 10 are connected to the outer wall of the central connecting rod 12. The bottom surface of the second stiffening plate 10 is preferably welded to the top plate 7, and the sidewalls are welded to the outer wall of the central connecting rod 12, thereby ensuring the connection strength between the top plate 7 and the central connecting rod 12, and thus providing suspension support for the adjusting plate 6, the inner ring plate 31, the outer ring plate 32 and the plurality of tensioning screws 5, and applying a tensioning force downward to the plurality of filter bags 2.
[0029] To reduce the increase in the overall weight of the diatomaceous earth filter 1 due to the tensioning mechanism, such as... Figure 5 As shown, the preferred adjustment plate 6 has several weight-reducing holes 6a to reduce the weight of the large-area adjustment plate 6.
[0030] To facilitate the installation and assembly of the tensioning screw 5 and the bottom of the filter bag 2, such as Figure 8 As shown, the tensioning screw 5 is threadedly connected to the inner ring plate 31, and the screw head of the tensioning screw 5 abuts against the outer wall of the outer ring plate 32. Rotating the screw head of the tensioning screw 5 allows it to be disassembled from the outside of the outer ring plate 32. During assembly, it is inserted into the outer ring plate 32 and then passes through the perforation at the bottom of the filter bag 2 before being connected to the side wall of the inner ring plate 31 for assembly.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope of protection, and all such changes and modifications fall within the scope of protection claimed by this utility model.
Claims
1. A tensioning mechanism for a diatomaceous earth filter bag, wherein the top of the filter bag is a circular opening and the bottom is a flat sealing edge, and the filter bag is suspended inside the diatomaceous earth filter through its circular opening and arranged at circumferential intervals, characterized in that: The tensioning mechanism includes an inner ring plate and an outer ring plate. The inner ring plate is coaxially connected to the bottom end of a downwardly extending central connecting rod in the diatomaceous earth filter. The outer ring plate is coaxially connected to the inner ring plate through first ribs spaced circumferentially. Several tensioning screws are inserted between the inner and outer ring plates at circumferential intervals. The tensioning screws are connected to the planar sealing edge of each filter bag. The filter bag is naturally tensioned downward by the tensioning mechanism.
2. The tensioning mechanism according to claim 1, characterized in that: An adjusting plate is provided at the top of the inner ring plate, and a top plate is provided above the adjusting plate. The top plate is sleeved on the central connecting rod. Suspension screws are provided at circumferential intervals on the bottom surface of the top plate. The suspension screws pass through the adjusting plate, and an adjusting nut that abuts against the bottom surface of the adjusting plate is sleeved on the suspension screw. By rotating the adjusting nut, the height of the tensioning screw is adapted to the height error of the filter bag manufacturing.
3. The tensioning mechanism according to claim 2, characterized in that: The adjusting plate is provided with adjusting screws at circumferential intervals, and the adjusting screws are spaced apart from the suspension screws, with the top of the adjusting screws abutting against the bottom surface of the top plate. By rotating the adjusting screws, the tensioning screws are moved downward to mechanically tension the filter bag downward.
4. The tensioning mechanism according to claim 2, characterized in that: The top surface of the top plate is provided with several second stiffening plates, the side walls of the second stiffening plates are connected to the outer wall of the central connecting rod; the adjusting plate is provided with several weight reduction holes.
5. The tensioning mechanism according to claim 1, characterized in that: The tensioning screw is threadedly connected to the inner ring plate, and the screw head of the tensioning screw abuts against the outer wall of the outer ring plate.